Established in 2004 by nVidia and a number of notebook vendors, MXM is an open, graphics interconnect standard commonly used in laptops. Nvidia created MXM with the goal of making laptop graphics cards more standardized and user-upgradeable.

However, it now appears that MXM's board edge connector has been pressed into use as a CPU module interconnect, in much the same way that the SODIMM interface standard for laptop memory modules was re-purposed by CPU module vendors like Strategic Test, Toradex, Cogent Computer Systems, Arcom, and others.

Embedian's 2.60 x 1.97-inch MXM-based boards maintain roughly the same dimension as the SODIMM module format, says the company. Instead of SODIMM's 200 pins, however, MXM uses a 242-pin "golden finger" connector. The result, says Embedian, is more design flexibility and expandability.



Embedian MXM-7114

The MXM-7114 and MXM-7110 appear to be identical except for the addition to the MXM-7114 of a Silicon Motion SM502 graphic chip. Like Embedian's recently announced COM-7211, both boards use a Samsung S3C2440A built around an ARM920T core running at 400Mhz, says Embedian. Equipped with 64MB SDRAM and 64MB NAND, the boards are said to include a 24-bit (32-bit) TFT LCD interface, two USB host ports, Ethernet, and extensive I/O (see specs below).


MXM-7114 block diagram


Specifications for the MXM-7114 include:

• Processor -- Samsung S3C2400A, 400 MHz
  
• Memory -- 64MB SDRAM (expandable to 128MB); 64MB NAND
  
• Video -- 1280x1024 SM502 graphics; 4-wire analog resistive touchscreen support
  
• Audio -- AC '97 compatible; line-in/out, mic interfaces
  
• Networking -- 10/100 Ethernet
  
• Other I/O:
  • 5 x standard serial ports (three from CPU and two from SM502)
    
  • 2 x SSP (synchronous serial protocol) ports (e.g. for SPI support)
    
  • 12 GPIOs
    
  • 8 external Interrupts
    
  • 2 x USB 1.1 host port with 4 x PWM outputs and I2C interface
• Expansion:
  • 3.3V IDE interface or CompactFlash interface
    
  • 16-bit system busPower supply -- 5 VDC input voltage only, maximum 1.6 W power consumption
    
  • Dimensions -- 2.60 x 1.97 inches (66mm x 50mm)
    
  • Operating temperature -- -5 to +75 degrees C
  
  The MXM-7114 module being inserted into the APC-7116 development board by the world's smallest hand
  
  Embedian also offers an APC-7116 development board for the new modules (see photo). Alternatively, customers can "re-spin" the carrier board, designing custom boards to meet their specific I/O needs.
  
  Availability
  
  MXM-7110 and MXM-7114 are available now with Windows CE 5.0 or Debian Linux pre-installed, says Embedian. An evaluation kit is also available for customers. Pricing was not disclosed.
  
  

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